no such file to load -- mkmf
While checking out Scott Baron coverage-tool for Ruby, insurance, I ran into a minor issue on my – by now – fairly beat up Debian installation.
Thankfully, Google led me to the answer on RubyForge. For some reason, mkmf.rb is part of the ruby1.8-dev package, and initially I hadn’t installed that since it is described as
Header files for compiling extension modules for the Ruby 1.8
Ah well. A quick
and everything trotted along happily after that.